from pylab import *
from numpy import *



g=[1,0,1,1,0,0,0,1]

b=[g[0]]

for i in range(1,8):
    
    if g[i]==0:
        b.append(b[i-1])
    if g[i]==1:
        if b[i-1]==0:
            b.append(1)
        if b[i-1]==1:
            b.append(0)


n8=b[0]*(2**7)
n7=b[1]*(2**6)
n6=b[2]*(2**5)
n5=b[3]*(2**4)
n4=b[4]*(2**3)
n3=b[5]*(2**2)
n2=b[6]*(2**1)
n1=b[7]*(2**0)

num=n1+n2+n3+n4+n5+n6+n7+n8


print num
